Heat ventilation device

ABSTRACT

A fan device mounted on the top opening of a cylindrical cooler. Fan comprises a ring plate member, a seat, a plurality of blades, and a plurality of ribs interconnected between the ring plate member and the seat. Blades are rotationally mounted on seat. The bottom of fan is abutted on the inner bottom surface of cooler. Wind generated by the activation of blades is directed toward cooler. As such, the heat transferred from a heat source may be effectively radiated to the outside.

FIELD OF THE INVENTION

[0001] The present invention relates to fans and more particularly to afan used in conjunction with cooler of central processing unit (CPU).

BACKGROUND OF THE INVENTION

[0002] It is known that the temperature of CPU is high during operation.As such, heat ventilation is very important as to the normal operationof CPU. A number of techniques and devices have been proposed andcommercially available for improving the heat ventilation of CPU bymanufacturers. For example, a heat ventilation device called “PowerCooler” 12 is mounted on the K7 processor manufactured by AMD a U.S.based corporation as shown in FIGS. 1 to 3. Such cooler 12 is a hollowcylinder having a plurality of fins parallel longitudinally disposed onthe outer surface. Further, a passage is formed between two adjacentfins for providing a heat ventilation path from the fan to the outside.The fan mounted on cooler 12 in FIG. 1 is different from the fan mountedon cooler 12 in FIG. 2. But both fans serve to radiate superfluous heatfrom CPU through the cooler 12.

[0003] But these two types of fans are unsatisfactory for the purposefor which the invention is concerned for the following reasons:

[0004] 1. As to the heat ventilation arrangement shown in FIG. 1, fan 10is secured to the inside of cooler 12 by a plurality of screws 11.However, the previous design suffered from several disadvantages. Forexample, seat 13 is very close to the bottom 16 of cooler 12 (FIG. 3).As such, the temperature at the bottom 16 is undesirably increasedbecause the bottom 16 is adjacent the hot CPU plus the heat generated bythe driving elements (e.g., coils, magnets, and etc.) accumulatedtherein. In brief, the provision of fan 10 has adversely affected theheat ventilation capability of cooler 12. Moreover, as shown in FIG. 3,it is difficult for a person to use a tool to perform afastening/unfastening of seat 13 inside the fan 10 due to the blockingof blades 14. One may increase the spacing between two adjacent blades14. But it inevitably sacrifices the heat ventilation efficiency due tothe reduction of the total area of blades 14. In fact, it is notapplicable. Also, as shown in FIG. 3, a power cord 15 under blades 14 isadjacent the hot bottom 16. As such, the shield of power cord 15 may bedamaged by the high temperature. This may adversely affect the normaloperation of fan 10.

[0005] 2. As to the other heat ventilation arrangement shown in FIG. 2,seat 23 is fixed to frame 22 under the ring plate member 21. This solvesthe problem (i.e., difficult for fastening/unfastening of fan 10 incooler 12) experienced in the FIG. 1 prior art. However, it stillsuffered from several disadvantages. For example, the heat ventilationpath of blades 24 is blocked by frame 22, thus lowers the heatventilation efficiency of the heat ventilation arrangement. Further,seat 23 is very close to the bottom of cooler 20. As such, thetemperature at the bottom of cooler 20 is still undesirably increasedbecause the bottom of cooler 20 is adjacent the hot CPU. This drawbackis the same as the heat ventilation arrangement in FIG. 1. Furthermore,the ring plate member 21 is glued to the top opening of cooler 20. Thisis a poor fastening design. In a worse condition, cooler 20 may becomedisengaged from fan due to the melting of the adhesive.

SUMMARY OF THE INVENTION

[0006] It is an object of the present invention to provide a fan devicemounted on the top opening of a cylindrical cooler. Fan comprises a ringplate member, a seat, a plurality of blades, and a plurality of ribsinterconnected between the ring plate member and the seat. Blades arerotationally mounted on seat. The bottom of fan is abutted on the innerbottom surface of cooler. Wind generated by the activation of blades isdirected toward cooler. As such, the heat transferred from a heat sourcemay be radiated to the outside.

[0007] It is another object of the present invention to provide a fandevice wherein the heat ventilation path of blades is not blocked,thereby improving the heat ventilation efficiency of the fan device.

[0008] It is still another object of the present invention to provide afan device wherein the power cord is far from the heat source, thuslowering the possibility of being damaged by the heat source.

[0009] It is a further object of the present invention to provide an fandevice wherein a plurality of fasteners are driven through the ringplate member to secure the fan to the cooler.

[0010] The above and other objects, features and advantages of thepresent invention will become apparent from the following detaileddescription taken with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

[0011]FIG. 1 is an exploded perspective view of a conventional heatventilation arrangement;

[0012]FIG. 2 is an exploded perspective view of another conventionalheat ventilation arrangement;

[0013]FIG. 3 is top plan view of the FIG. 1 arrangement;

[0014]FIG. 4 is an exploded perspective view of a heat ventilationdevice according to the invention;

[0015]FIG. 5 is a cross-sectional view of the assembled fan and coolershown in FIG. 4;

[0016]FIG. 6 is a top plan view of the assembled fan and cooler shown inFIG. 4; and

[0017]FIG. 7 is a partial enlarged fragmentary view showing thefastening of ring plate member and cooler of FIG. 4.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Referring to FIGS. 4 to 7, there is shown a heat ventilationdevice constructed in accordance with the invention comprising a cooler30 and a fan 40 secured to the top opening 30 a of cooler 30. Cooler 30is a hollow cylindrical member having a plurality of fins 31 parallellongitudinally disposed on the outer surface. Further, a passage 31 a isformed between two adjacent fins 31 for providing a heat ventilationpath from the fan 40 to the outside. A short cylindrical bar 33 isprojected on the underside 32 of cooler 30. Bar 33 is in contact with aheat source (e.g., CPU not shown). Thus heat generated by CPU may betransferred to cooler 30 through bar 33. Fan 40 comprises a ring platemember 41, a seat 43, a plurality of blades 44, and a plurality of ribs42 interconnected between ring plate member 41 and seat 43. Blades 44are rotationally mounted on seat 43. The bottom 44 a of fan 40 isabutted on the inner bottom surface of cooler 30. Wind generated by theactivation of blades 44 is blowing toward cooler 30 and fins 31. Assuch, the heat transferred from CPU may be radiated to the outsidethrough passages 31 a and fins 31.

[0019] A plurality of pairs of parallel inserts 461 and 462 are providedat the underside of ring plate member 41. A connecting member 463 iscoupled between inserts 461 and 462. A threaded hole 47 is formed atring plate member 41 between the pair of inserts 461 and 362. As shownin FIG. 7 specifically, inserts 461, 462 are inserted into two passages31 a respectively, while connecting member 463 is urged against theinner rear sides of fins 31. Thus ring plate member 41 is engaged withcooler 30. A screw 50 is driven through threaded hole 47 to secure to apassage 31 b. As such, fan 40 is secured to cooler 30. Further, aplurality of elongate arcuate ventilation openings 411 are equallyspaced apart on ring plate member 41 for enhancing the heat ventilationof the invention. Furthermore as shown in FIG. 4, a hole 412 is formedon ring plate member 41 for allowing power cord 45 to pass through. Thepower cord 45 is far from the bottom of cooler 30 (i.e., adjacent CPU)for lowering the possibility of being damaged by the high temperatureCPU.

[0020] While the invention has been described by means of specificembodiments, numerous modifications and variations could be made theretoby those skilled in the art without departing from the scope and spiritof the invention set forth in the claims.

What is claimed is:
 1. A heat ventilation device comprising: a hollowcylindrical cooler including a plurality of fins parallel longitudinallydisposed on the outer surface, a plurality of passages each formedbetween two of the adjacent fins for providing a heat ventilation pathfrom the inside to the outside, and a bar projected on the undersidebeing in contact with a heat source for absorbing heat therefrom; and afan mounted in the cooler with the bottom abutted on the bottom surfaceof the cooler, the fan including a ring plate member, a seat, aplurality of blades rotationally mounted on the seat, and a plurality ofribs interconnected between the ring plate member and the seat, wherebywind generated by the blades is directed toward the cooler and the fins,thereby radiating heat transferred from the heat source to the outsidethrough the passages and the fins.
 2. The device of claim 1, furthercomprising a plurality of pairs of parallel inserts at the underside ofthe ring plate member wherein the pair of the inserts are inserted intotwo of the passages for engaging the ring plate member with the coolerand a threaded hole at the ring plate member between the pair of theinserts for permitting a fastener to drive through the threaded hole tosecure to the passage for securing the fan to the cooler.
 3. The deviceof claim 2, further comprising a connecting member coupled between thepair of the inserts and urged against the inner rear sides of two of thefins.
 4. The device of claim 1, further comprising a plurality ofelongate arcuate ventilation openings equally spaced apart on the ringplate member.
 5. The device of claim 1, further comprising a hole on thering plate member for allowing a power cord to pass through.